Controller mechanism for mechanical musical instruments.



0. M. WELTE. v CONTROLLER MECHANISM FOR MECHANICAL MUSICAL INSTRUMENTS.APPLICATION FILED DEC. 11, 1913- 1,252,064:. Patented Jan; 1,1918.

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Afr/2mm C. M. WELTE. CONTROLLER MECHANISM FOR :fiEC-HANICAL MUSICALINSTRUMENTS.

APPLICATION FILED [)ELX HI ISI3 la'ten'te Jan. 1, 1918.

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APPLICATION FILED DEC-11.1913.

Patented Jan. 1,1918.

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W/T/VESSES c4 M. WELTE. CONTROLLER MECHANISM FOR MECHANICALMUSICAL'JNSTRUMENTS.

APPLICATION FlL ED DEC. 11, I913- Patented J an. 1, 19 18.

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ATTORNEY C. M. vWELTE.

CONTROLLER MECHANISM FOR MECHANICAL MUSICAL INSTRUMENTS.

APPLICATION FILED DEC. 11, I913.

5 SHEETSSHEET 5- Patented J an. 1, 1918.

CAEL M. WELTE, OF NEW: YORK, N. "55., A

SSIGNQlFt TO M.

reach. I

wanna & sons, 1nd, or

I NEW YOB/K, N. '51., A. JOEYORATIOEE 01" NEW YORK.

CONTROLLER MEGHANISIVI FOE MECHANICAL MUSICAL INSTRUMENTS.

Application filed December 11, 1913.

To all whom it may concern:

Be it known that I, CARL M. Wnn'rn, a citizen of the United States, anda resident of New York, in the county of ew York and State of New York,have invented certain new and useful improvements in ControllerMechanism for Mechanical Musical Instruments, of which the following isa full, clear, and exact description, whereby anyone skilled in the art.may make and use the same.

The invention relates to certain new and useful improvements inautomatically operated musical instruments and is directed moreparticularly to the control mechanism, that is, the mechanism whichcontrols the operation of the playing devices such as the perforatedmusic sheet and its winding and re-winding mechanisms and the control ofthe tracker-board which is used in conjunc' tion witha perforatedmusic-sheet.

tracker-board and in playing The invention is applicable generally tomusical instruments wherein the operation of the sound-producing devicesis actuated and controlled by a perforated music sheet, card, tablet orthe like, which is moved over a tracker-board having ducts or conduitswhich are suitably connected with pneumatically actuated devices.

In instruments of this character a single sheet of perforated music iscarried by two rollers arranged on opposite sides of the said sheet, itis unwound from one rollerand wound upon the other roll.

The movement of the music sheet during the playing operation is, ofcourse, quite slow and although the rewinding of the sheet after it isplayed may be accomplished with considerable speed, it is obvious thatthere is a pause in the operation of the instrument after a certainselection or number of selections have been played.

To over-come this lost time it has become a practice to emplo aplurality of trackerboards, each of sai trackers having an independentpair of music rolls for playing and re-winding the music sheet. "in suchdevices/provision has Been made for re-- windin one music-sheet duringthe playing of anot er independent music sheet so that Specification ofLetters Patent.

yatented Jan. 1, 1913. serial No. 805,916.

to all purposes playing of the instrument has been possible.

11 such devices, however, it has been neces sary to provide a somewhatcomplicated systern of winding and rte-winding mechanism for each set ofrolls employed, to say nothing of the space occupied by such amechanism.

It has also become a practice to use an endless music strip with asingle trackerboard but in this case, in order to provide a number ofselections, a great amount of space must be provided for carrying theendless music strip and this of necessity is a serious offset againstthe advantages of continuous playing. Furthermore, in such a device, aconsiderable amount of time is lost in removing played music andinserting a new strip.

and intents a continuous The principal object ofthe present inven- Ition is to provide 'a mechanism which will be of extremely simple andcondensed form and will provide for continuous playing of the instrumentwith but a single music sheet and its winding and re-winding roll orreel. A further object of the invention is to provide a mechanism whichwill be driven from a main source of power-and in which the drivingmotor and connections will al ways rotate in the same direction, thusavoiding the necessity of shifting devices for reversing the movement ofthe main elements of the device. I

A still further object of the invention is to provide for an automaticcontrol of the air passages of the tracker-board with reference to theplayer pneumatics.

in general, the objects of the invention are to eliminate thecomplications of the multiple tracker'devices, the endless music stripdevices and produce with a single music sheet and tracker-range, acontinuous or intermittent playing of the, instrument as desired,employing a maximum number of selections for a given length ofperforated sheet.

. The devices embodying the invention are applicable to any type ofmechanically open ated musical instrument whether it he a piano,piano-player, orchestrion or other ,wind or String instrument so lopgasithere is a moving perforated music-sheet employed in conjunction witha tracker.

Referring to the drawings:

Figure 1 is a view somewhat in diagram illustrating the relativeposition of the various part of the mechanism in connection with thevalve actuators of a Wind instrument. 1 Fig. 2 is a view in frontelevation of the music rolls and the winding mechanism therefor shown inenlarged scale as compared with Fig. 1.

Fig. 3 is a detail plan view on enlarged scale of. a small section ofthe tracker-board.

Fig. 4 is a detail view in perspective illustrating the connecting partsof the musicroll and. drivingshaft for said roll.

Fig. dis a detail view in side elevation taken from the right of Fig. 2with parts broken away to better illustrate the construction.

Fig. 6 is a detail view of one of the musicroll driving gears with itsratchet and pawl.

Fig. 7' is a sectional view taken transversely through the music-rollsand tracker:

board and a player pneumatic illustrating the control of the ducts ofthe tracker board. Fig. 8 is a detail perspective view of the twosections of the shifting valve.

Fig. 9 is a detail side view partially in section and partially indiagram illustrating a modified form of valve chest and.

player pneumatic in conjunction with the tracker-board and appurtenantparts.

No attempt has been made in the accompanying drawings to show a fullmusical instrument with its many parts and as the invention relatesparticularly to the mechanism appurtenant to the tracker-board and musicrolls and to the controlling devices for the tracker-ducts, only suchmechanism as forms a part of these structures is illustrated anddiagrams have been employed wherever a more simplified. showing of theconnections and mechanisms was possible.

In the accompanying drawings the numeral 1 denotes a base or supporthaving risers 2, 3, provided with suitable bearings for the musicrolls5, 6, which are removably arranged with reference to theirbearings. As illustrated, the music roll 5 is made removable through 9.lug and slot connection, such as illustrated in Figs. 2 and 4, thetubular shaft 7 being held against the compression of a spring 8 so thatby an endwise movement the roll 5 may be removed from its end bearing 9.

In ordinary practice, the roll or reel 6 does not have to be removedfrom the instrument as provision is ordinarily made for. attaching theend of the music-sheet to the cylinder of the roll after the music-roll5 with the sheet has been inserted in its bearings.

eas es The shaft 7 is supported not only in the 6 riser 3 but also in anend-supporting bracket 10 and this shaft has a disk 11 having acomparatively wide peripheral face which is loosely mounted upon theshaft 7. Mounted upon the same shaft 7 and fast thereon is aratchet-Wheel 12 and between said ratchet and the disk 11, there is agear 13, which is free to rotate on said shaft 7 except when it isconnected therewith through a pawl 14 which is pivotally mounted uponthe gear 13 and is arranged to engage the ratchet 12 as hereinafter morefully described.

The shaft 15 of the roll or reel 6 also has mounted thereon a disk 16identical in form and construction with the disk 11. This disk isloosely mounted upon the shaft 15 which shaft also has mounted upon it agear 17. Intermediate the gear 17 and disk 16 is a ratchet wheel 18which is secured to the shaft 15.

The gear 17, as in the case of the gear 13 is free to rotate on itsshaft 15 except when it is connected therewith through a pawl 19 pivotedupon. the gear 17 and adapted to be engaged with and disengaged from theratchet 18.

The friction disk 11 has projecting froni it a controlling pin 20 whichis arran ed to control the position of the pawl 14 wit reference to theratchet 12. I.

The friction disk 16 has a controlling pin 21 which is arranged tocontrol the engagement and disengagement of the pawl 19 with referenceto its ratchet 18.

The gears 13 and 17 are constantly in mesh with intermediate pinions 22,23, the pinion 23 being a main driving pinion which is connected asillustrated in Fig. '1 with a main driving shaft 24 which in turn isconnected with a rotary motor 25.

The motor 25 always rotates in the same direction and the main drivingpinion 23 which is in contact with the gear 17 always drives said gearin the direction indicated in Fig. 5 and through the intermediate pinion22 the (gear 13 is always driven in the direction in icated by thearrow. This condition exists with either of said gears, acting as adriving gear when its respective ratchet and pawl is connected with itsshaft. 1

With this arrangement, assuming that the roll 5 is the removable rollwhich bears the music sheet S and assuming that said music sheet S hasalready been unwound from the roll 5 andwvound upon the roll 6, as itwas drawn across the tracker T and assuming that said music sheet S isnow being rewound upon the roll 5, it is obvious that the pawl 14 of thegear 13 is in engagement with. the ratchet 12 while the pawl 19 of thegear 17 is disengaged from the ratchet 18. Thus.

the driving shaft. 24 through its pinion 23 gear 13 and the music roll5'while the gear 17 is running free upon its shaft 15 permitting thefree movement of the music roll 6 (see Fig. 5).

This Winding of the music sheet in one direction or the other iseffected by a mechanism which actuates'the friction disks 11 audlfi.

Arranged upon the base 1 is a support 26 to which are secured thestationary members. 27, 28 ofa air of pneumatic actuators or bellows A,1?, their movable boards 29, 30 being connected by an angularly formedbar or lever 31. These pneumatic actuators are subject to inflation andexhaustion and thus the bar 31 in conjunction with the movable board 29forms a lever for moving a controlling bar 32. This controlling bar 32projects upward intermediate the friction disks 11 and 16 and hasarranged upon either side thereof friction members 33 which, as illus-.trated, areof curved form and adapted to be pressed against theperipheries of the disks 11, 16 whenever .thev are moved past movementof the bar 31 and movable board 29.

As the friction disks 11 and 16 are loosely 4 mounted upon theirrespective shafts 7 and 15 and as each has a controlling pin 20, 21over-lying the rearward ends of the ratchets 14, 19, it is obvious thatupon a collapse of the bellows A, the spring arms 33 of the bar 32 willbe forcibly brought into engagement with the peripheries of the frictiondisks. A partial rotation of said disks with their pins serves to movethe pawls 14, 19

either into or out of engagement with their respective ratchets 12, 18.This is clearly indicated in Fig. 5 where the pawl 14 is in engagementwith the ratchet 12 and the pawl 19 is disengaged from its ratchet 18.

Assume that the friction disks 11, 16 are held or partially rotated bythe friction members 33 during the downward movement of the bar 32, thepin 20 will ride along the rearward end of its pawl 14 disengaging saidpawlfrom the ratchet 12. Simultaneously the pin 21 of the disk 16 willmove toward theforward end of the pawl 19 and will permit said pawl toengage with its ratchet 18. Thus, the roll 5 will The free to rotatewhile the roll 6 will be driven by its gear 17. Thus, the music roll Swill pass over the tracker T from the roll 5 to the roll 6. As soon asthe position -of the pawls is reversed through the action of thecontrolling bar 32 and its bellows, the reversecondition will obtain andthe music sheet will then be drawn from the roll 6 onto the roll 5.

It will be noted from Figs. 2, 3 and 7 of the drawings that thetracker-board T has a double row of ducts or openings, one row saiddisks by the V Over-lying the of ducts t arranged to be operative duringthe movement of the music sheet in one direction while'the other row twill be operative during the movement of the music sheet in the oppositedirection.

The music sheet itself has perforations arranged for each set oftracker-ducts so that one set of selections will be played by the musicroll through the tracker-ducts t While said roll is being moved inonedirection and a second set of selections will be played by the musicsheet S, as its perforations register with the tracker-ducts 15 duringthe reverse movement of the sheet.

This, in conjunction with the mechanism specifically described herein,provides for continuous playing of an instrument and the mechanismheretofore described defines means for driving the main shaft always inthe same direction and securing a direct- -disks 11 and 16 is effectedby mechanism illustrated in Figs- 1, 2, mechanism also controls the twoseries of 5, 7 and 8 and this tracker-ducts so that the layer pneumaticsare pro erly actuated y either set of trackeructs dependent upon thedirection of movement of the music-sheet S.

The actuators A and B are connected to a valve mechanism '0 by suitableducts 34, 35. The duct 34 connects with a port 36, in a stationary block37 while the duct '35 connects with a port 38 in said block 37. Thisblock 37 has ports 39, 40 connected respectively with the ports 36, 38and is also provided with ports 41, 42 which, through a channel 43 andconduit 44 connects with the main suction bellows D of the instrument,which, as illustrated, is actuated by a suitable motor.

stationary block 37 is a movable valve-block 45 which has ducts and aport 46 opening to the atmosphere and ducts and a port 47. also openingto the atmosphere. Arran the movable block 45 and between the twoatmospheric ducts 46, 47 is a channel 48 which is adapted to connecteither of the ports 39, 41 or the ports 40 and 42 to the main suctionduct 44. Thus, by shifting the block 45. either the actuator A or theactuator B may be subjected to suction of the main bellows l) andsimultaneously as either of said actuators A'or B is'thus connected, oneof the ports 46, 47 is brought into communication with one of the ports39 or 40 and the corresponding bellows is connected with the atmosphere.

As illustrated. in the drawings, the actuator B is subjected to suctionwhile the actuator A is open to the atmosphere'.

As a means for shifting the movable block ged in the bottom face of thelever 49 bears a spring-pressed catch 51 and the outer end of the link50 is connected to a pivoted lever 52 which bears a sprin'g- W pressedcatch 53.

The music-rolls or spools are each provided with a notch 54, 55 and asthe music sheet is unwound from the rolls, either the catch 51 willengage its notch 54: or the catch 53 will engage its notch 55 dependentupon the direction of movement of the musicsheet. As illustrated in Fig.7, the musicsheet is passing from the roll 6 to the roll 5 and theperforations of the roll corresponding to the tracker-openings t areoperated. As 'soon as the latch 51 engages the notch 54, the valvemember 45 will be shifted to the opposite limit of its play andthereupon the actuator A will be collapsed under suction while theactuator B will be inflated. This will pull down upon the controller bar32 shifting the friction disks to release the pawl 14 from its ratchet12 and engage'the pawl 19 with its ratchet 18. The musicsheet willthereupon immediately change its direction of movement and the roll 6will become the Windin roll while the roll 5 will run free.-Simull-aneously with this movement the tracker-ducts corresponding tothe tracker-openin s t will become, inefiectivefor actuating t eplayerneumatics and the tracker-ducts 2%? will become active. The

tracker-ducts and their action upon the playerneumatics is alsocontrolled by the valve-C and' actuators and B through an independentvalve mechanism E. This valve mechanism E is common to all of the playerneumatics, it being understood, of course, that there are twotracker-ducts for each player pneumatic, said ducts correspondingrespectively to the series of tracker-openings t and t,

For controlling the tracker-ducts of the respective series oftracker-openings v, 5, there is illustrated particularly in Figs. 1 and7 of the drawings, a valve mechanism which is automatic in its actionand is controlled through the actuators A and B and the air connectionsof the valve mechanism C to place either the series of trackerducts t orthe series of tracker-ducts t in playing communication With the playerpneumatics P. It is to be understood that there is a player pneumaticfor each note of the instrument and a trackenduct connection 56 fromeach of'the tracker-openings t and a tracker-duct connection 57 for eachof the tracker-openings in the series 5, which tracker-ducts actuate thevalves 58 of the player plieumatics P dependent upon which direction themusic-sheet S is moving. The

valve chest E has a main suction chamber 59 which 18 111 communicationwith the main memes To control the valve 63 and its position/f I twowind motors 66, 67 or other suitable as: vices are employed and asillustrated in Fig. 7 the movable boards of the windmotors or bellows66, 67 are connected with the spindle 68 which bears the valve 63. Thebellows 66 communicates through a ouct 69 with the actuator A while thebellows fi't' has a duct 70 connecting with the actuator B. It followsthat whenever the actuator B, as illustrated in Fig. 6, is subjected todeflation by the suction of the main bellows l) of the instrument, thebellows 67 will also be denated and by a simultaneous action, theactuator it being. open to atmosphere will be inflated and the bellows66, through its duct 69 connecting it with the actuator A will beinflated. Thus the valve 63 will occupy the position illustrated in Fig.'i closing the port 64L".

Assuming that the perforations of the sheet are opening thetracker-ducts 15 to atmospheric pressure, a diaphragm 71 covering achamber 72 which, through a bleedhole 73 communicates with the suctionchamber 62, will be released b the admitting of atmosphere to the chamor 72 which will break the suction in said chamber. Thereupon,'the valve58 will shift from its seat 7% and subject the player pneumatic bellowsp of the player pneumatic P to the main suc tion of the instrumentthrough the wind trunk 59 and appurtenant connections until the musicsheet closes the tracker-ducts T. Obviously, the tracker-ducts t willthus be operative so long as the valve 63 closes port 64.

As soon as the bellows A is deflated and the bellows B expanded, thebellows 66 will e be deflated and the bellows 6'2 will be expandedshifting the valve 63 to open the port 64. and close the port 65.Thereu'pon the valves 58 of the player pneumatics will be shifted toclose the ports 75. Thereupon, the series of tracker-ducts i will becomeoperative with reference to the player pneuma-tics P and by breaking theexhaust of the chamber 76 under the diaphragm 77, the valve 58 will heraised to open the port 75 andcollapse the bellows 7) whenever thetracker-ducts t are open.

As illustrated in Fig. 1, two sets of player pneumatics P areillustrated with theirvarious connections to the tracker-ducts indicatcdin diagram and shown as controlling the valves of two distinct sets ofwind chests, the valves appurtenant tothe chest X escapes being openwhile chest Y are closed. This merely illustrates a possible connectionof the player pneumatics of a wind any desired form of connection may beemployed between the player neumatics and the sounding device.

be understood that the specific valve mechanism G a form of shift- It isalso to method 'of shifting the illustrated herein is merely ing devicewhich may be employed and that well'known shifting devices, such Y anyof the as commonly employed in instruments this class may be used inlieu thereof.

In Fig. 9 of the drawings there is illustrated a simple mo ified form ofcontrolling alve {or the tracker-ducts which obviates 2 ing position theuse of the specific form of air-motors 66, 67 and shifting valve 03heretofore described. In this modification, the bellows 100 and 101 areillustrated in dotted outline to save confusion, the bellows 100 beingshown as collapsed and subject to the main suction through a duct 102,while the bellows 101 is open to the atmosphere through a duct 103. Theducts 102, 103 communicate with a valve mechanism 104 identical withthat heretofore illustrated and described.

The tracker-duct controlling valve Z has a duct 105 communicating withthe collapsed bellows 100. The duct 106 communicates with a valvechamber 107 which is covere by a diaphragm valve 108 and the duct 105communicates with a valve chamber 109 which has a diaphragm valve 110.The diaphragm 108 controls the communication between tW" pasasges 111and 112. The passage 111 is in communication with a trackerduct 113while the assage 112 is in communication with a (fuct 111 leading to theplayer pneumatic.

The diaphragm valve 110 controls two passages 115,116. The passage 11%)communicates with a tracker-duct 117 while the passage 116 communicateswith the duct or wind-trunk 114: of the player pneumatic.

The chamber 109 being under suction inasmuch as it is in connection withthe collapsed bellows 100 and through said, bellows with the mainsuction of the instrument raises the diaphragm 110 and establishescommunication between the tracker-ducts 117 and the pla er pneumaticduct 11a. The bellows 101 sing expanded and subject to atmosphericpressure, the diaphragm valve 108 is closed and breaks the communicationbetween the passages 111 and 112.

Thus, the tracker-ducts 117 are fl-n playwith reference to theplayerpneumatics and whenever a tracker-duct is uncovered by a perforation inthe music sheet, a valve-chamber 118 will be subjected to atmosphericpressure, whereupon its diaphragm valve 119 which controls a valve thoseappurtenant to the ing an air-port 122.

instrument and obviously,

120 will rise, opening e port 121 communicates with an exhaustwind-trunk 123 and as the port 121 is uncovered, the bellows 124 of theplayer pneumatic will be collapsed. A bleed-hole 125 provides 'forequalizing the pressure above and below the r 119 when the tracker-ducts117 are closed. Thereupon, the valve 120 will close the port 121, openthe atmospheric port 122 and inflate the bellows 124.

it will be seen from the above description that the valve mechanism Zthrough its connection with the bellows 100 and 101 willconnect eitherone or the other of the series of, tracker-openings corresponding to theducts 113, 117 directly with the valve chain'- bers 118 of the playerpneumatics and While one series of tracker-ducts is thus open andeffective for playing operations, the other is closed.

It will be noted that in the form first described or in the abovemodified form for controlling the two distinct series of tracker-ducts,that the control is intermediate theplayerpneumatics and the mainexhaust of the instrument so that the tracker-ducts are connecteddirectly to the player pneumatics to release and subject themindividually to suction while the valve mechanism controls the mainsuction with reference to either series of tracker-ducts. There is anobvidus advantage in this arrangement inasmuch as the tracker-ducts maybe permanently connected into the player pneumatics and very simplewindtrunks may be utilized which are common to all of the pneumatics andwhich are definitely and accurately controlled by a single valvemechanism for all of the pneumatics and the various series oftracker-ducts. 1

Obviously, it is perfectly feasible and possible to utilize this samevalvemechanism any number of tracker-boards each having an independentmusic sheet. This would give the same number of selections but, 0course, i of the winding and re-winding mechanism for each roll.

Obviously, many rangement of the mechanism herein illustrated anddescribed may be madewithout departing from the spirit or intent of theinvention and a plurality of series of trackerducts may be equally wellcontrolled by a valve mechanism embodying the same elements andprinciples as herein defined.

What 1 claim as my invention and desire to secure by Letters Patent is:v

1. In a device of the character described, a pair of musicrolls, eachhaving a driving shaft, a driving gear on the shaft of each music-roll,a main driving shaft, a gear on said shaft constantly connect d withboth of diaphragm valve a ort 121 'andClOS- Tli f i would require merelya duplication modification of the arsaid gears, a clutch deviceintermediate each ofsaid driving gears and its respective shaft andautomatic means for simultaneously connecting one of said clutch devicesand releasing the other of said clutch devices.

2. In a device of the character described, a pair of music-rolls, eachhaving a driving shaft, a driving gear on the shaft of each music-roll,a main driving shaft, 2. gear on said shaft constantly and permanentlygearconnected with both of said gears, a clutch device intermediate"each gf said driving gears and its respective shaft and automatic meansfor simultaneously connecting one of said clutch devices and-leleasingthe other of said clutch devices.

3. In a device of the character described, a pair of music-rolls, eachhaving a driving shaft, a driving gear on the shaft of each music-roll,a main driving shaft, a gear on said shaft -and gears connecting saidgear constantly with both of said driving gears, a clutch deviceintermediate each of said driving gears and its respective shaft andfriction devices for controlling the clutches.

4. In a device of the character described,

a pair of music-rolls, each having a driving shaft, a driving gear onthe shaft of each music-roll, a main driving shaft, a gear on said shaftand intermediate gearing constantly connecting said shaft with both ofsaid driving gears, a clutch device intermediate each of said drivinggears and its respective shaft and friction devices for automaticallycontrolling the clutches.

5. In a device of the character described, a pair of music-rolls, eachhaving a driving shaft, a driving gear on the shaft of each music-roll,a main driving shaft, a gear on said driving'shaft and intermediategearing constantly connecting said shaft With both of said drivinggears, a clutch device intermediate each of said driving gears and itsrespective shaft, a friction device for controlling the clutches and apneumatic motor for actuating said friction device.

6. In a device of the character described,

a pair of music rolls. a driving shaft for each of said rolls, a drivinggear for each of said shafts,a main driving shaft, a gear on said mainshaft and intermediate'garing constantly connecting said shaft with eachof said driving gears, means for clutching and releasing said drivingears with reference to their respective s afts and means for alternatelyactuating the clutching and releasing mechanism of each shaft.

7. In a device of the character described,

a pair of music rolls, a driving shaft for each of said r lls, a drivinggear for each of said shafts, ii main driving shaft, a gear on said maindriving shaft constantly in intermeshing engagement with each of saiddriving gears, means for clutching and releasing either of said drivinggears with reference to their respective shafts and pneumatic means foralternately actuating the clutching and releasing mechanism of eachshaft.

8. In a device of the a pair of music rolls, each roll, a driving maindriving shaft,

character described, a driving shaft for gear for each shaft, a a gearon said driving shaft havin constant inter-meshing engagement with 0thof the said driving gears, a clutch device intermediate each of saidgears and its driving shaft, a friction disk for each shaft controllingthe respective clutch devices, a pneumatic motor for controlling saidfriction disks, a valve for controlling the operation of said motor andmeans intermediate the music rolls and valve for actuating said valve.

9. In a device of the character described, a pair of music rolls eachhaving a driving shaft, a driving gear on the shaft of each music roll,a ratchet and pawl intermediate each of saidgears and its respectiveshaft, a friction disk controlling the position of the pawls withreference to the ratchets, a friction member controlling the movement ofthe friction disk and a pneumatic for automatically controlling thefriction member. 10. In a device of the character described, a pair ofmusic rolls each having a driving shaft, a driving gear on the shaft ofeach music roll, a ratchet and. pawl intermediate each of said gears andits respective shaft,

a friction disk controlling the position of the pawls with reference tothe ratchets, a friction member controlling the movement of the frictiondisks and a pneumatic for automatically controlling the friction memberand valve connections operable from the music roll for controlling apneumatic.

11. In a device of the character described, a pair'of music rolls, adriving member for each of said rolls, driving said shaft always in thesame direction and which is always in driving connection with both ofsaid members and automatic means for simultaneously connecting one ofsaid members and other of said members from driving connection with itscorresponding music roll.

12. In a device of the character described, a pair of music rolls, anote sheet to be wound from one of said rolls to the other 120 and adriving member for each of said rolls, a driving shaft, means fordriving said shaft always in the same'direction and yvhich is always indriving connection with 'both of said members and automati rsimultaneously connecting one of said members and disconnecting theother of said members from driving connection with its a drivingshaft,means for disconnecting the corresponding music roll, a o laower drivingshaft, means for driving sai shaft always in the same cl1reet1on and.which is always in driving connection with oh of sale. members and meansfor automatically bring"- ing one of said clutches into action andthrowingthe other clutch out of action said'means being controlled bythe position to saicl of the note sheet with relation roll.

CARL M. WEL JZE.

Witnesses:

NM. B. HILL, KATE BRElTN-ER.

